Impact of Ferroelectric Distortion on Thermopower in BaTiO3
Materials Science
2015-06-23 v1
Abstract
We present a strategy for increasing thermoelectric performance by invoking ferroelectric distortion in a transition-metal oxide. By using an ab initio calculation approach with the Boltzmann transport equation, a large Seebeck coefficient is calculated in n-type BaTiO3. The polar structural distortion causes the peculiar dispersion of the lowest conduction band, which enhances the Seebeck coefficient along the polar direction. A microscopic mechanism of carrier concentration dependence of the Seebeck coefficient is discussed in terms of the band velocity distribution in the Brillouin zone.
Keywords
Cite
@article{arxiv.1502.03525,
title = {Impact of Ferroelectric Distortion on Thermopower in BaTiO3},
author = {Hiroaki Saijo and Kunihiko Yamauchi and Koun Shirai and Tamio Oguchi},
journal= {arXiv preprint arXiv:1502.03525},
year = {2015}
}
Comments
6 pages, 6 figures, submitted to JPSJ